Question: The automobile radiator is a heat exchanger of
[A].parallel flow type
counter flow type
cross flow type
regenerator type
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
In counter-current flow heat exchangers
Question: In counter-current flow heat exchangers
[A].both the fluids at inlet are in their hottest state
both the fluids at inlet are in their coldest state
both the fluids at exit are in their hottest state
one fluid is coldest and the other is hottest at inlet
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
In counter-current flow heat exchanger, the logarithmic temperature difference between the fluids is __________ as compared to parallel flow heat exchanger.
Question: In counter-current flow heat exchanger, the logarithmic temperature difference between the fluids is __________ as compared to parallel flow heat exchanger.
[A].same
less
greater
[A].
[B].
[C].
Answer: Option C
Explanation:
No answer description available for this question.
In a parallel flow heat exchanger, the rate of flow of heat and the rate of decrease of temperature are maximum.
Question: In a parallel flow heat exchanger, the rate of flow of heat and the rate of decrease of temperature are maximum.
[A].Yes
No
[A].
[B].
Answer: Option A
Explanation:
No answer description available for this question.
Logarithmic mean temperature difference is the same as the arithmetic mean temperature difference.
Question: Logarithmic mean temperature difference is the same as the arithmetic mean temperature difference.
[A].Agree
Disagree
[A].
[B].
Answer: Option B
Explanation:
No answer description available for this question.
A device used for transfering heat from one fluid to another is called heat exchanger.
Question: A device used for transfering heat from one fluid to another is called heat exchanger.
[A].True
False
[A].
[B].
Answer: Option A
Explanation:
No answer description available for this question.
Free convection flow depends on
Question: Free convection flow depends on
[A].density
coefficient of viscosity
gravitational force
all of these
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
An electric cable of aluminium conductor (k = 240 W/mK) is to be insulated with rubber (k = 0.15 W/mK). The cable is to be located in air (h = 6 W/m2). The critical thickness of insulation will be
Question: An electric cable of aluminium conductor (k = 240 W/mK) is to be insulated with rubber (k = 0.15 W/mK). The cable is to be located in air (h = 6 W/m2). The critical thickness of insulation will be
[A].25 mm
40 mm
160 mm
800 mm
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
Fourier’s law of heat conduction gives the heat flow for
Question: Fourier’s law of heat conduction gives the heat flow for
[A].irregular surfaces
non-uniform temperature surfaces
one dimensional cases only
two dimensional cases only
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
BRISTLE : BRUSH
Question: BRISTLE : BRUSH
[A].arm : leg
stage : curtain
recline : chair
key : piano
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
A bristle is a part of a brush; a key is a part of a piano.